| 摘要 |
PROBLEM TO BE SOLVED: To provide a passive filter and air-conditioner, which is little limited by a power frequency and capable of suppressing a harmonic generated from a load circuit driven by an AC power supply.SOLUTION: A passive filter 30, suppressing a harmonic of a load circuit driven by supply of a three-phase alternating current, comprises a resonance circuit 31 which is connected with power supply system side of each phase and formed by connecting a coil 56 and a capacitor 58 in series. The inductance of the coil 56 is 1.0-1.8 mH and the capacity of the capacitor 58 is 200-350 μF. |
